Hey,
Still not sure if a setting is causing this, but the database is a copy of production so should have the same settings.
On production the URL's to products are for example: https://mountainbikemuseum.nl/mountainbikes/kirk-revolution-474
On the dw10 test site it is : https://testing.mountainbikemuseum.nl/mountainbikes?ProductID=ITEM474
It does seem the correct URL's are in the index, so might be a Swft thing I guess?